Key-seat-cutting attachment for drill-presses.



G. BERGHAUSEN. KEY SEAT CUTTING ATTACHMENT FOB. DRILL PRBSSES.

' I APPLICATION FILED we. 15, 1910.

1,045,501. Patefited Nov. 26, 1912.

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G. BBRGHAUSEN. KEY SEAT CUTTING ATTACHMENT FOR DRILL PRESSES.APPLICATION FILED AUG.15, 1910.

1,045,501, Patented Nov. 26, 1912.

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UNITED STATES PATENT onuicu.

GEORGE BERG-HAUSEN, 0F CINCINNATI, OHIO, ASSIG-NOR TC EDWARDIBERGHAUSEN, OF CINCINNATI, OHIO, DOING BUSINESS AS BERGHAUSEN MACHINECOMPANY.

KEY-SEAT-CUTTING ATTACHMENT FOB. DRILL-PRESSES.

Specification of Letters Patent.

Patented Nov. 26, 1912.

Application filed August 15, 1910. Serial No. 577,244.

Drill-Presses, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart of this specification.

My invention relates to machines for cutting slots in machine parts,more particularly for cutting key-seats either external or internal inshafting, hubs, collars and the like, and the object of the invention isto furnish a machine for this purpose as an attachment for drill presseswhich can be readily and easily mounted or supported on the drill presstable and connected with the drill chuck or spindle coupling to drivethe rotary milling cutter for external seats and the reciprocating sawcutter for internal seats.

The invention consists of the certain novel construction and arrangementof parts to be hereinafter particularly pointed out and claimed wherebythe attachment to the drill 'pressmay be instantly made, the worksecurely and efiectively clamped in position and automatically fed tothe milling cutter to cut any length or depth of slot desired withoutany further attention from the operator, the mechanism beingautomatically stopped when the slot or key-seat of the required lengthhas been out.

In the drawings, Figure l is a side elevation of my improved attachment.Fig. 2 is a detail front elevation of a portion of the drivingmechanism. Fig. 3 is a transverse section of one of the work holdingclamps. Fig. 4 is a rear elevation of the attachment. Fig. 5 is a rearside elevation of the same.

The operating parts are mounted and suitably supported in a substantialstandard 1, provided with a substantial base plate 2 which is intendedto rest onand when desired be bolted to the bed plate of the drillpress. Mounted loosel in the hub 3, carried bythe arm 4:, bolte on topof the standard 1 is a vertical shaft 5, arranged at its upper end 6 tomake connection with a drill press. On the lower end of this verticalshaft or spindle 5 is a beveled pinion 7 which meshes with the beveledgear 8 on the end of the horizontal shaft 9, having its bearings inbosses 10 and 11, which project rearwardly from a plate 12, which ismounted to slide up and down in a dovetailed runway formed on the rearface of the standard 1, and this plate is adjust-able vertically by thescrews 13 connected therewith in the usual way, the screw being mountedin the boss 14 on the arm 4 and adjusted by the handle 15. The lower endof the spindle 5 has its bearing in an upwardly projecting extensionfrom the boss 11, so that the spindle 5 is mounted in the plate 12, andis ad- "justed vertically with the movement of the plate 12.

Mounted horizontally above the shaft 9 and parallel thereto is the shaft16 which has its bearings in the bosses 17 and 18, also projectingrearwardly from the plate 12, so that these two shafts and the gearsthereon are capable of vertical adjustment.

On the inner end of the shaft 9 is a pinion 19, which meshes with thegear 20 on the inner end of the shaft 16, while on the opposite or frontend of the shaft 16 is mounted the milling rotary cutter 21. It will beevident from the construction so far described, that by the rotation ofthe spindle 5 by the drill press power through the train of gearingconsisting of the miter gears 7, 8, spur gears 19, 20, the milling.cutter will be rotated at the desired speed. It will also be evidentthat by the adjustment of the screw 13, the milling cutter can beadjusted to the proper vertical position, inasmuch as the spindle 5 isloosely mounted in the hub 3 and lengthwise adjustable therein.

For properly holding and feeding the work to this milling cutter, Iprovide as follows: The clamps for holding the work are mounted on anadjustable frame comprising a vertical portion 22 and a horizontalportion 23 integral therewith, the frame being properly braced by theribs 24, 24:. The rear face of the vertical portion of this clampholding frame is dovetailed to engage the correspondingly beveled face25 on the main framework. The clamp holding frame is adjusted lengthwiseby means of the screw 26, which is threaded into the boss 27 on the rearface of the clamp framework. The upper face of the horizontal section 23of the clamp frame is also provided with a dovetailed runway 28 in whichis seated a correspondingly beveled plate 29. On this plate 29 isirounted, with a dovetailed connection 30, the clamp plates 31 and 32.The clamp plates 31 and 32 are recessed to receive the clamping jaws 33,34, and 35, 36, which are arranged in pairs opposite each other forholding the work, one pair in each clamp plate. The base 37 of each jawis extended and the plates 38 are bolted along the upper edge of theclamp plates to overhang the extended base of the jaws and thus holdthem in place. Bolted to the plates 31 and 32 in front are the bearingblocks 39, 40, in which are mounted the adjusting screws 41, 42, foreach pair of clamp jaws. The screws are threaded in an oppositeclirection and engage correspondingly threaded recesses in the clampjaws, so that the rotation of the screws by the handles 43 or 44 willmove the jaws to or away from each other. The inner surface of each jawis formed on an obtuse angle 45, so that the 47 mounted between theotherpair'of jaws. 30"

Instead of employing i a center, the work itself can bemounted betweenthe two pairs .of jaws as will be readily understood.

As already-described, the milling cutter 21 can be adjusted at theproper height by adjusting the screw 13 with handle 15: and.

1 by sliding the plate 29, the work can be at once-brought to the properposition for the milling tool to operate. The work is fed to the millingcutter, as already stated, by

means of the screw 26 secured to the clamp frame atone end and mountedin theboss 48 on the main stationary frame 1.

Mounted loosely on the outer end of the screw 26 is a worm gear 49 whichis en- :gaged by the worm 50 mounted on the shaft '51 suitably journaledin an arm '52 projecting from the stationary frame. This shaft 51 isdriven by the tight gear 53 which meshes with the pinion 54 mounted onshaft '55 suitably journaled in the-arm 52, and

. this shaft 55 also carries the sprocket wheel 1 56 driven by sprocketchain 57 from the sprocket wheel 58 mounted on the shaft 9,

'so that during the operation of the machine through this train ofgearing, the worm gear 49 is constantly rotated. The'worm gear 49 isfurnished with a hub 59 which is I notched to receive the lug' 60' onthe sleeve 61 keyed to or slidable onthe end of the shaft of the screw.This sleeve 61. is formed with f an annular groove 62 which is normallyeny gaged' by the bar 63Ypiv'oted at'64 on the "frame, the-bar '63beingnormally held horizontally in engagement with the sleeve by thespring 65. The sleeve 61 is also. pro

vided with a second annular groove 66 engaged by an arm 67 pivoted toswing horizontally at 68 to the frame.

A spring, not shown, is provided for the clutch member 61 to throw itout of engagement with the hub on the worm gear when the locking bar 63is thrown downward out of the groove 62. V f

Mounted horizontally in a boss 69 on the main clamp frame 22 is a-rod 70held in any desired position by the set screw 71. The outer end of thisrod is provided with a bifurcated enlargement 72 and with a beveledblock 73. As the clampingdevice and the work are fed by the rotation ofthe screw 26, the rod 70 is so adjusted that at a desired point theblock 73 will first come in contact with the roller 74 on theend of thebar 63 to throw it out of engagement with the clutch member, andthe'bifurcated ends 72 will then engage the arm 67 and disengage theclutch from thewormgear, so that the feed of the work will automaticallybe stopped at the desired point.

For the purpose of cutting internal slots or keyways in collars, hubsand the like,.I provide as followsz'Mounted in a runway on the rear sideof the framework 1 and arranged toslide back and forth is a saw holdingframe 75, in which frame is mounted a chuck 76 for holding a saw 77, thechuck holding devices being adjustable by the screw 7 8. The saw holdingframe and saw are reciprocated by the connecting rod 79 coupled at oneend to the frame and at the other to thecrank stud 80 on the wheel 81.

Mounted in the fr'ameand secured to this wheel is the gear 82 whichmeshes with a loose. gear 83 mounted alongsideof the gear 53 'on theshaft 51. The hub of the loose gear 83 is notched at 84 to receive thelug 85 'of the clutch member 86, keyed to but slidable on shaft 51.Normally this clutch is held out of engagement with the loosely mountedgear 83, but when it is desired to drive the saw, the clutch is pushedinto engagement, and in this .way the crank wheel 81 is rotated toreciprocate the'saw holder and saw. I

ed on the fixed frame, a rotary milling cutter and train of gearingmounted on the vertically. adjustable frame, a feed screw. for thehorizontally adjustable frame-mounted on the fixed frame with gearingfor operating the same, and afie-Xible power transmit-v ting connectionfor the two sets of gearing,

and a spindle for driving the milling cutter,

slidinglymounted in the fixed frame.

1. 2. In a machine: of the character. specified,

a fixed frame, and a horizontally adjustable frame mounted on the fixedframe, a feed screw for the adjustable frame mounted on the fixed frame,with gearing for operating the same, a rotary milling cutter with avertically adjustable frame in which the same is mounted, and a spindlefor driving the milling cutter slidingly mounted in the fixed frame,with a train of gearing connecting the spindle with the feed drivinggear whereby the rotation of the spindle will drive the rotary cutterand feed the adjustable frame.

3. In a machine of the character specified, a fixed frame, and ahorizontally adjustable frame mounted on the fixed frame, a feed screwfor the adjustable frame mounted on the fixed frame, worm gear looselymounted on the shank of the feed screw with worm and gearing foroperating the same, and a clutch connecting the worm gear to the screwshaft with an arm adjustably mounted on the adjustable frame to shiftthe clutch to disconnect the feed screw at any predetermined point ofthe feed, a rotary milling cutter with a vertically adjustable frame inwhich the same is mounted, and a spindle for driving the milling cutterslidingly mounted in the fixed frame with power transmitting connectionbetween the gearing for driving the cutter and for feeding the GEORGEBERGHAUSEN. Witnesses:

ARTHUR H. EWALD, K. SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

